dotfiles/nvim/language_server.vim

" nvim-lspconfig
sign define LspDiagnosticsSignError text=✗ texthl=LspDiagnosticsSignError linehl= numhl=
sign define LspDiagnosticsSignWarning text=⚠ texthl=LspDiagnosticsSignWarning linehl= numhl=
sign define LspDiagnosticsSignInformation text=ℹ texthl=LspDiagnosticsSignInformation linehl= numhl=
sign define LspDiagnosticsSignHint text= texthl=LspDiagnosticsSignHint linehl= numhl=

set completeopt=menuone,noinsert,noselect

lua << EOF
lsp_mappings = function()
  local function buf_set_keymap(...) vim.api.nvim_buf_set_keymap(bufnr, ...) end

  -- Mappings.
  local opts = { noremap=true, silent=true }
  buf_set_keymap('n', 'gD', '<cmd>lua vim.lsp.buf.declaration()<CR>', opts)
  buf_set_keymap('n', 'gd', '<cmd>lua vim.lsp.buf.definition()<CR>', opts)
  buf_set_keymap('n', 'K', '<cmd>lua vim.lsp.buf.hover()<CR>', opts)
  buf_set_keymap('n', 'gi', '<cmd>lua vim.lsp.buf.implementation()<CR>', opts)
  buf_set_keymap('n', '<c-k>', '<cmd>lua vim.lsp.buf.signature_help()<CR>', opts)

  buf_set_keymap('n', '<space>wa', '<cmd>lua vim.lsp.buf.add_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wr', '<cmd>lua vim.lsp.buf.remove_workspace_folder()<CR>', opts)
  buf_set_keymap('n', '<space>wl', '<cmd>lua print(vim.inspect(vim.lsp.buf.list_workspace_folders()))<CR>', opts)
  buf_set_keymap('n', '<space>D', '<cmd>lua vim.lsp.buf.type_definition()<CR>', opts)
  buf_set_keymap('n', '<space>rn', '<cmd>lua vim.lsp.buf.rename()<CR>', opts)

  buf_set_keymap('n', 'gr', '<cmd>lua vim.lsp.buf.references()<CR>', opts)
  buf_set_keymap('n', 'g0', '<cmd>lua vim.lsp.buf.document_symbol()<CR>', opts)
  buf_set_keymap('n', 'gW', '<cmd>lua vim.lsp.buf.workspace_symbol()<CR>', opts)

  buf_set_keymap('n', '<space>e', '<cmd>lua vim.lsp.diagnostic.show_line_diagnostics()<CR>', opts)
  buf_set_keymap('n', '[d', '<cmd>lua vim.lsp.diagnostic.goto_prev()<CR>', opts)
  buf_set_keymap('n', ']d', '<cmd>lua vim.lsp.diagnostic.goto_next()<CR>', opts)
  buf_set_keymap('n', '<space>q', '<cmd>lua vim.lsp.diagnostic.set_loclist()<CR>', opts)
end
EOF

lua << EOF
local nvim_lsp = require('lspconfig')
-- lspkind-nvim
cmp_format = require('lspkind').cmp_format{
  with_text = false,
  preset = 'codicons',
  menu = {nvim_lsp = "[LSP]", buffer = "[Buffer]", path = "[Path]"}
}

local on_attach = function(client, bufnr)
  vim.api.nvim_command('autocmd CursorHoldI <buffer> lua vim.lsp.diagnostic.show_line_diagnostics({show_header = false})')
  vim.lsp.handlers["textDocument/publishDiagnostics"] = vim.lsp.with(
    vim.lsp.diagnostic.on_publish_diagnostics, {
      update_in_insert = true,
      virtual_text = false
    }
  )
  require('cmp').setup{
    formatting = {format = cmp_format},
    sources = {
      {name = 'nvim_lsp'},
      {name = 'buffer', keyword_length = 5},
      {name = 'path'}
    },
  }
  lsp_mappings()
end

local settings = require('lsp_settings')
local servers = {'pylsp', 'clangd'}
local capabilities = vim.lsp.protocol.make_client_capabilities()
capabilities = require('cmp_nvim_lsp').update_capabilities(capabilities)
for _, lsp in ipairs(servers) do
  nvim_lsp[lsp].setup{on_attach=on_attach, settings={[lsp]=settings[lsp]},
                      capabilities=capabilities}
end
EOF

" cmp
" Setup buffer configuration (nvim-lua source only enables in Lua filetype).
autocmd FileType gitcommit lua require'cmp'.setup.buffer {
\   sources = {
\     { name = 'spell' },
\     { name = 'buffer', keyword_length = 5 },
\     { name = 'path' },
\   },
\ }